Scott, you are going to literally have tens or hundreds of thousands of notables. So I am not sure if tracking them as notable within the project is really practical.
One long-term thought that I have always had in mind is to simply rely on the Wikipedia standard for notability, and really only try to track those people for the notables project.
The long-term rule has been that If the profile has a matching Wikipedia article which survives, then it gets the [[Category:Famous People of ...]] along with the Wikipedia link in the bio. So you can track the vast majority of your Notables for project purposes by relying on usage that existing category structure.
So perhaps there could be some kind of report which tracks the difference. For instance, a report to display profile which have a [[Category: Famous (wildcards)]] but which do not have a {{Notables}} template.
And vice versa. So then for maintenance purposes, you could gererate much smaller profile lists to determine which profiles really need to be worked on.
A similar report could also generate a list of profiles that have either the Notables template or the Famous category, but do not have the Project ID account as manager.
And always keeping in mind that a fairly large subset of your Notables are valid for the Project, but do not reach the higher threshold of Wikipedia Famous.
And then also you have many which are Wikpedia Famous, but are handled better on WikiTree by other projects, such as Royal family members in EuroAristos.
So if some of the brilliant tech geniuses here could generate such fluctuating reports of lists of profiles that fit in either one subset but not the other, I think that would give the project a practical way to actually work up and down the lists, for profile improvement and template and category completion, etc.Unless I am dreaming :)